Earth

According to the speculation of some netizens, these so-called UFOs may just be farce

The modern Earth's atmosphere is so rich in oxygen that the vast majority of this hydrogen will be re-oxidized to water without escaping from the Earth's top atmosphere

In the Arctic Siberian region, there is a huge crater called "the mouth of hell"

The climate patterns on Earth will then become chaotic, and humans will lose the ability to control and drive the Earth's climate to remain stable and conducive to the habitability of humans and the Earth's biosphere as a whole

In general, when a spacecraft, probe or rocket wreckage re-enters the atmosphere, they are fast, reaching several kilometers per second or even faster

For humans, the universe is too dimensional for us to see the details of its depths for the time being

If humans evolved from the forest archaeopteryx, how did the forest archaeopteryx emerge?

If we dig up all the sand in the Sahara Desert, then we can see the "bedrock" of this desert

In this 5.5 million-year-old cave, not only is there no sunlight, but the environment is also very harsh

Mount fuji, located in the south of honshu island in japan, is a famous active volcano, with an altitude of about 3,775 metres, and is the highest peak in japan, so it has a very important symbolic status in japan. From the viewpoint of its appearance, mount fuji is still quite different from many other mountains, and when viewed from afar, it looks like an upside down fan hanging in the air.